Hi Bob
> I don't know what the request pattern from filebench looks like but it seems
> like your ZEUS RAM devices are not keeping up or
> else many requests are bypassing the ZEUS RAM devices.
>
> Note that very large synchronous writes will bypass your ZEUS RAM device and
> go directly to a log in the main store. Small (<=
> 128K) writes should directly benefit from the dedicated zil device.
>
> Find a copy of zilstat.ksh and run it while filebench is running in order to
> understand more about what is going on.
>
> Bob
The pattern looks like:
N-Bytes N-Bytes/s N-Max-Rate B-Bytes B-Bytes/s B-Max-Rate ops <=4kB
4-32kB >=32kB
9588656 9588656 9588656 88399872 88399872 88399872 90 0
0 90
6662280 6662280 6662280 87031808 87031808 87031808 83 0
0 83
6366728 6366728 6366728 72790016 72790016 72790016 79 0
0 79
6316352 6316352 6316352 83886080 83886080 83886080 80 0
0 80
6687616 6687616 6687616 84594688 84594688 84594688 92 0
0 92
4909048 4909048 4909048 69238784 69238784 69238784 73 0
0 73
6605280 6605280 6605280 81924096 81924096 81924096 79 0
0 79
6895336 6895336 6895336 81625088 81625088 81625088 85 0
0 85
6532128 6532128 6532128 87486464 87486464 87486464 90 0
0 90
6925136 6925136 6925136 86118400 86118400 86118400 83 0
0 83
So does it look good, bad or ugly ;)
Thomas
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
